Quantum Gateway is a merchant gateway solution that supports 3D Secure for Visa® and MasterCard® transactions in WHMCS.

Supported Features #

Type: Merchant (Credit Card)

Adding the Quantum Gateway Payment Gateway #

To set up the Quantum Gateway payment gateway in WHMCS:

1. Go to Configuration () > Apps & Integrations or Addons > Apps & Integrations.
2. Click Quantum Gateway.
3. Check Show on Order Form to display this payment method in the Client Area during checkout.
4. Enter your Quantum Gateway credentials.
   • You must use your Quantum Gateway login ID as your username.
   • You can generate the Restrict Key value in the Quantum Gateway merchant center on the Processing Settings page.
   • To set up the MD5 hash:
     1. Log in to the Quantum Gateway merchant center.
     2. Go to Configuration () > Processing Settings.
     3. Under MD5-Hash, enter a secret key value for Hash Value.
     4. Set Include Response in Hash to No.
     5. Enter the same hash value in WHMCS.
5. Click Save Changes.

Test Mode #

This payment gateway module does not include test mode.

Troubleshooting #

You can find information about most payment gateway-related errors in the logs at Billing > Gateway Log and in the Module Log.

Last modified: 2025 March 19